WO1997003490A1 - Rotor a cage - Google Patents

Rotor a cage Download PDF

Info

Publication number
WO1997003490A1
WO1997003490A1 PCT/JP1996/001969 JP9601969W WO9703490A1 WO 1997003490 A1 WO1997003490 A1 WO 1997003490A1 JP 9601969 W JP9601969 W JP 9601969W WO 9703490 A1 WO9703490 A1 WO 9703490A1
Authority
WO
WIPO (PCT)
Prior art keywords
laminated core
annular
tubular portion
reinforcing member
hole
Prior art date
Application number
PCT/JP1996/001969
Other languages
English (en)
Japanese (ja)
Inventor
Kosei Nakamura
Yohei Arimatsu
Original Assignee
Fanuc Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fanuc Ltd filed Critical Fanuc Ltd
Priority to US08/793,843 priority Critical patent/US5952764A/en
Priority to DE69634625T priority patent/DE69634625T2/de
Priority to EP96923091A priority patent/EP0786855B1/fr
Publication of WO1997003490A1 publication Critical patent/WO1997003490A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/0054—Casting in, on, or around objects which form part of the product rotors, stators for electrical motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/0012—Manufacturing cage rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
    • H02K17/165—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors characterised by the squirrel-cage or other short-circuited windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
    • H02K17/168—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors having single-cage rotors

Definitions

  • the present invention relates to a cage rotor of an induction motor provided with a reinforcing member for preventing deformation of an end ring during high-speed rotation.
  • Induction motors commonly used as spindle motors include a plurality of conductor rods arranged in a plurality of holes penetrating in the axial direction near the outer peripheral surface of the laminated core, and an axial direction of the laminated core.
  • a cage-shaped rotor is formed by integrally forming a conductor portion made of a pair of end wires for connecting the conductor bars at both ends to each other by a manufacturing process. If the speed of the induction motor having such a cage rotor is increased, the end-portion may be bent or broken by centrifugal force during high-speed rotation.
  • a separate reinforcing member made of a high-rigidity material such as iron or stainless steel is fixedly arranged on the rotor around each end wire to deform the end wire.
  • a cage rotor for high-speed rotation which prevents the rotation.
  • the term ⁇ deformation '' of the end ring means here that the shape or state of the end ring changes temporarily or permanently due to elastic deformation, plastic deformation, fracture, breakage, etc. That is what you do.
  • an end ring reinforcement member of a high-speed cage rotor a cylindrical wall portion covering the outer peripheral surface of the end portion cylindrical portion and an annular end wall portion covering the outer side surface of the end portion ring.
  • a cage-shaped rotation with a U-shaped cross-section (the opening side is directed to the rotation shaft side) in one direction is made of an annular element.
  • This is disclosed in Japanese Patent Application Laid-Open No. Hei 6-105511. This will be described with reference to FIG. 6A and FIG. 6B, which is an end view taken along the line E—E in FIG. 6A.
  • a cylindrical portion 1 26 covering the surface, and an end wall extending radially inward from one end in the axial direction of the cylindrical portion 1 26 to cover the outer end surface in the axial direction of 120.
  • Perforated wall 1 2 extending radially inward from the other end of the cylindrical portion 1 2 6 in the axial direction and being sandwiched between the laminated core 1 1 4 and the end ring 1 2 0 8 and are provided together.
  • the perforated wall portion 128 has a plurality of holes 132 corresponding to the plurality of holes 116 of the laminated core 111 on which the conductive rods 118 are arranged.
  • This reinforcing member 1 2 2 is The conductor rods 1 18 and the end ring are arranged in such a way that the hole groups 1 16 and the hole groups 1 3 2 of the perforated wall 1 2 8 are arranged at both ends of the laminated core 1 1 4 in the ⁇ direction.
  • each reinforcing member 122 is fixedly connected to the laminated core 114 and the terminal 120. .
  • the end member of the cage rotor disclosed in Japanese Patent Application Laid-Open No. Hei 6-105 ⁇ 11 and the reinforcing member 122 are cut from a round bar made of a high-strength metallic material such as iron or stainless steel. It is formed into a shape as described above by machining such as cutting. At this time, an annular concave portion that opens on the inner peripheral side is bored along the peripheral wall of the center hole of the annular blank that has been semi-processed from the round bar, thereby forming a tube having a substantially U-shaped cross section. An integral body of the shape-like portion 126, the end wall portion 130 and the porous wall portion 128 is formed. Further, a plurality of holes 13 2 are formed in the porous wall portion 128.
  • An object of the present invention is to provide an induction machine having high reliability, which is capable of preventing deformation of an end ring due to centrifugal force during high-speed rotation, and which is provided with a reinforcing member which is easy to machine.
  • the object is to provide a basket-shaped rotor that can be produced at a factory.
  • a cage rotor of the present invention includes a rotating shaft, a laminated core in which a number of magnetic thin plates fixedly connected to the rotating shaft are laminated, and a plurality of through holes provided in the laminated core.
  • a plurality of conductor rods arranged in the same direction, and a pair of end rings arranged at both axial ends of the laminated core and interconnecting the conductor rods.
  • the ring includes a tubular portion having the same inner diameter as the diameter of the central through hole of the laminated core, an annular end wall extending radially outward from one end in the axial direction of the tubular portion, and a shaft of the tubular portion.
  • a reinforcing member in which an annular locking wall extending radially outward from the other end in the center direction is integrally formed, and the tubular portion constituting the reinforcing member is the end link and the rotating shaft. Sandwiched between and The ⁇ -shaped end wall covers substantially the entire outer end surface in the axial direction of the end-entanglement, and the annular locking wall is sandwiched between the laminated core and the end-entry ring. I am trying to become.
  • the reinforcing member has a tubular shape extending from its outer periphery ( ⁇ ) by a small distance from its outer periphery ( ⁇ ) in a direction parallel to the axis of the tubular portion toward the mating reinforcing member.
  • An extension is formed integrally with the annular end wall.
  • the basket-shaped rotor of the present invention having the above-described configuration has a flexure such that the inner peripheral edge of the end ring is turned radially outward along the axis due to centrifugal force during high-speed rotation.
  • An end ring reinforcing member that can prevent the occurrence of the end ring is provided.
  • the end reinforcing member can be easily machined. Therefore, it is possible to produce a high-speed induction machine having high structural reliability at a low cost by using the rotator of the present invention.
  • FIG. 1 is a partial cross-sectional front view of a ragged rotor according to the present invention.
  • FIG. 2 is a cross-sectional view of the cage rotor taken along the line 11-1-11 in FIG.
  • FIG. 3 is a cross-sectional view of the cage rotor taken along the line 1 1 1 -I I I in FIG.
  • Figure 4 ⁇ is an end view of the reinforcing member.
  • FIG. 4B is a side view of the reinforcing member along the line a_a in FIG. 4A.
  • Fig. 5 is a partial cross-sectional front view showing an example of the manufacturing process of the cage rotor of Fig. 1.
  • FIG. 6A is a cross-sectional view of a reinforcing member according to the prior art.
  • FIG. 6B is an end view of the reinforcing member taken along the line 111 in FIG. 6A.
  • the cage rotor 10 is composed of a laminated core 16 in which a number of magnetic thin plates such as silicon steel plates are laminated and fixedly connected to the rotational shaft 12 and the rotational shaft 12, and a plurality of laminated cores 16.
  • a plurality of conductor rods 20 arranged in the through hole 18 in the axial direction of the core and a pair of conductor rods 20 arranged at both axial ends of the laminated core 16 and connecting the conductor rods 20 to each other And 2 2
  • the laminated core 16 has a central through-hole 14 formed concentrically with its axis, through which the rotating shaft 12 penetrates. Further, as shown in FIG. 2, the laminated core 16 is formed with a plurality of peripheral through holes 18 extending in the axial direction at equal intervals in the circumferential direction close to the outer peripheral portion thereof. ing.
  • the conductor rod 20 fits into these peripheral through holes 18. One end and the other end of the conductor rod 20 fitted into the peripheral through-hole 18 are both out of the peripheral through-hole 18 and are integrally connected to a ring-shaped end ring 22. That is, the plurality of conductor bars 20 are mechanically and electrically connected to each other via the pair of end wires 22. Later Thus, the conductor portion is formed by integrally molding the plurality of conductor bars 20 and the pair of end rings 22.
  • the pair of end wires 2 2 2 are arranged so as to sandwich the laminated core 16.
  • the center of the end ring 22 in this state coincides with the axis of the central through hole 14 of the laminated core 16.
  • the plurality of conductor rods 20 and the pair of end rings 22 are integrally formed from a highly conductive metal material such as aluminum or copper through a mirror-casting process such as die casting.
  • the conductor bar 20 is fitted into the peripheral through hole 18 of the laminated core 16, and the laminated core 16 is sandwiched by the pair of end rings 22.
  • the conductive rod 20 may be arranged to be inclined with respect to the axis as is well known in order to reduce torque unevenness during operation of the motor.
  • the cross-sectional shape of the conductor rod 20 (that is, the cross-sectional shape ⁇ of the peripheral through hole 18) can take various shapes other than the illustrated circular shape.
  • the reinforcing member 24 has a tubular portion 26 having an inner diameter substantially the same as the diameter of the central through hole 14 of the laminated core 16, and extends radially outward from one axial end of the tubular portion 26.
  • An annular end wall 28 and a rectangular locking wall 30 extending radially outward from the other end in the axial direction of the tubular portion 26 are integrally formed.
  • the outer diameter of the end wall 28 substantially matches the outer diameter of the laminated core 16, and the outer diameter of the locking wall 30 is.
  • the reinforcing member 24 is formed from a highly rigid material such as iron or stainless steel by machining such as cutting or cutting. Further, preferably, a tubular extension 32 extending inward from the outer peripheral edge of the annular end wall 28 by a small distance inward in a direction parallel to the axis of the tubular portion 26 is formed into an annular shape. It is formed integrally with the end wall 28.
  • each reinforcing member 24 becomes The outer circumferential surface covers the inner circumferential surface of the end ring 22, the annular end wall 28 covers the outer side surface of the end ring 22, and the rectangular locking wall 30 is the axis of the laminated core 16.
  • the extension 32 is partially engaged with the outer peripheral surface of the end ring 22 (see FIG. 1).
  • the laminated core 16 is fitted to 2
  • the inner peripheral surface of the cylindrical portion 26 of each reinforcing member 24 comes into contact with the rotating shaft 12. That is, the cylindrical portion 26 of the reinforcing member 24 is sandwiched between the rotating shaft 12 and the end wire 22.
  • each reinforcing member 24 in forming a conductor portion including a plurality of conductor rods 20 and a pair of end wires 22, each reinforcing member 24 is formed by an annular locking wall 3. 0, and is fixedly supported by the laminated core 16 via the 6 is fixedly supported on the rotating shaft 12 in the radial direction in particular.
  • the annular end wall 28 of the reinforcing member 24 covers the outer surface of the end ring 22 and turns the end ring 22 due to centrifugal force during high-speed rotation, particularly the inner circumference. Prevent bending such as rising.
  • the extension 32 of the reinforcing member 24 partially engaging with the outer peripheral surface of the end ring 22 prevents the annular end wall 28 from bending outward in the axial direction in the outer region.
  • Such an end ring reinforcing action by the reinforcing member 24 is not limited to the end rotation as long as the cage-shaped rotor '10 is used in a high-speed rotation region that does not reach an ultrahigh-speed rotation of tens of thousands of revolutions per minute. Deformation of the entanglement ring 22 can be reliably prevented.
  • the reinforcing member 24 has the shape of an annular structure having an L-shaped cross section opened outward in the radial direction, the tubular portion 26, the annular end wall 28, and the annular locking wall 30 are provided. Since the cutting process for forming the hole is performed by applying the tool edge from the outer peripheral side of the annular structure, the production cost can be easily suppressed.
  • a plurality of magnetic thin plates punched in a disk shape are laminated so as to have openings corresponding to the center through hole 14 and the peripheral through hole 18 and are temporarily fixed to each other by caulking, for example.
  • the reinforcing members 24 are concentrically arranged on the laminated core 16 with their annular locking walls 30 in contact with the respective end faces of the laminated core 16.
  • annular locking wall 30 of the reinforcing member 24 is not large enough to close the plurality of peripheral through holes 18 of the laminated core 16
  • the annular locking wall 30 is The openings of the plurality of peripheral through-holes 18 at both end surfaces of the laminated core 16 are not reduced to any extent. Therefore, both annular spaces 34 are communicated with the plurality of peripheral through holes 18 of the laminated core 16 so that the fluid can flow smoothly.
  • the laminated core 16 and the reinforcing members 24 are integrally supported by the jig 36 while the reinforcing members 24 are arranged at both axial ends of the laminated core 16. Then, it is housed in the mold space of mold 38, and the structure is implemented. At this time, one reinforcing member 24 is arranged on the side of the gate 40 of the mold 38, and the annular space 34 is communicated with the gate 40. c. Also, in order to stabilize the flow of the molten metal at the time of fabrication. In addition, the other reinforcing member 24 disposed on the side of the gate is provided with a small hole 4 for venting air at each portion of the annular end wall 28 facing each of the plurality of peripheral through holes 18 of the laminated core 16. 2 is preferred (see Figure 4).
  • the molten metal such as molten aluminum flows from the gate 40 into the annular space 34 under pressure, for example, and then flows into the plurality of peripheral through holes 18 of the laminated core 16. Then, it flows into the annular space 34 on the side of the gate. Melt in that state The hot water solidifies, and a conductor portion composed of a plurality of conductor rods 20 and a pair of end rings 22 is integrally formed (FIG. 1).
  • the completed laminated core 16 is removed from the mold 38 together with the jig 36, and then the jig 36 is removed. In this way, the laminated core 16 and the pair of reinforcing members 24 integrated by forging the conductor portion are fixed to the rotating shaft 12 (FIG. 1) by shrink fitting, for example.
  • the cage rotor 10 of FIG. 1 is formed.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Induction Machinery (AREA)

Abstract

Rotor à cage pour moteur asynchrone, dont l'anneau terminal (22) destiné à l'interconnexion des barres de rotor (20) est recouvert d'un élément de renforcement (24). Ce dernier comprend une partie tubulaire (26) possédant sensiblement le même diamètre intérieur qu'un trou débouchant (14) situé au centre du noyau feuilleté (16), une paroi terminale de type annulaire (28) s'étendant radialement vers l'extérieur depuis l'une des extrémités de cette partie tubulaire (26) dans le sens axial, et une paroi de fixation de type annulaire (30) s'étendant radialement vers l'extérieur depuis l'autre extrémité de la partie tubulaire (26) dans le sens axial, les éléments (26), (28) et (30) formant une seule pièce.
PCT/JP1996/001969 1995-07-13 1996-07-15 Rotor a cage WO1997003490A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US08/793,843 US5952764A (en) 1995-07-13 1996-07-15 Cage rotor having reinforcing members that prevent deformation of end rings at moderately high rotation speeds
DE69634625T DE69634625T2 (de) 1995-07-13 1996-07-15 Käfigläufer
EP96923091A EP0786855B1 (fr) 1995-07-13 1996-07-15 Rotor a cage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP7/177429 1995-07-13
JP17742995A JP3718541B2 (ja) 1995-07-13 1995-07-13 籠形回転子

Publications (1)

Publication Number Publication Date
WO1997003490A1 true WO1997003490A1 (fr) 1997-01-30

Family

ID=16030790

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1996/001969 WO1997003490A1 (fr) 1995-07-13 1996-07-15 Rotor a cage

Country Status (5)

Country Link
US (1) US5952764A (fr)
EP (1) EP0786855B1 (fr)
JP (1) JP3718541B2 (fr)
DE (1) DE69634625T2 (fr)
WO (1) WO1997003490A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
EP2549630A1 (fr) * 2011-07-22 2013-01-23 Siemens Aktiengesellschaft Cage d'écureuil d'une machine asynchrone et procédé de fabrication d'une telle cage

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DE19901195A1 (de) * 1999-01-14 2000-07-27 Siemens Ag Druckguß-Käfigläufer für elektrische Maschinen und Verfahren zur Herstellung desselben
DE19916459A1 (de) * 1999-04-12 2000-10-26 Bosch Gmbh Robert Starter-Generator für ein Kraftfahrzeug
DE60023704T2 (de) * 1999-07-16 2006-08-03 Matsushita Electric Industrial Co., Ltd., Kadoma Synchronmotor mit dauermagneten
KR100421385B1 (ko) * 2001-09-22 2004-03-09 엘지전자 주식회사 고속운전용 유도전동기의 회전자 구조
US20050017597A1 (en) * 2003-07-23 2005-01-27 Mays Harold H. End ring support structure for electric motor
NL1026424C2 (nl) * 2004-06-15 2005-12-19 Siemens Ind Turbomachinery B V Rotor voor elektromotor, compressoreenheid voorzien van rotor, werkwijze voor het vervaardigen van een rotor voor een elektromotor.
DE102005030377A1 (de) * 2005-06-29 2007-01-11 Siemens Ag Asynchronmaschine
CN201219227Y (zh) * 2008-07-30 2009-04-08 无锡东元电机有限公司 一种永磁同步电机转子
CN201204529Y (zh) * 2008-08-28 2009-03-04 无锡东元电机有限公司 永磁同步电机
CN201294443Y (zh) * 2008-12-01 2009-08-19 东元总合科技（杭州）有限公司 永磁自启动同步电机转子
DE102009010601A1 (de) * 2009-02-25 2010-08-26 Siemens Aktiengesellschaft Kupferläufer
DE102009018951A1 (de) * 2009-04-25 2010-11-04 Ksb Aktiengesellschaft Kurzschlussläufer mit gegossenen Kurzschlussstäben
JP5513070B2 (ja) * 2009-10-22 2014-06-04 サムスン電機ジャパンアドバンスドテクノロジー株式会社 ディスク駆動装置
WO2011145509A1 (fr) * 2010-05-17 2011-11-24 日立金属株式会社 Dispositif de couplage
DE102010043384A1 (de) 2010-11-04 2012-05-10 Siemens Aktiengesellschaft Asynchronmaschine, insbesondere stromrichtergespeiste Asynchronmaschine mit Kurzschlussläufer und Verfahren zur Herstellung eines Kurzschlussläufers
US8684257B2 (en) * 2011-08-15 2014-04-01 GM Global Technology Operations LLC Rotor for electric motor and brazing process
DE102012214772A1 (de) * 2012-08-20 2014-02-20 Robert Bosch Gmbh Rotor für eine elektrische Maschine
US9024501B2 (en) * 2012-10-09 2015-05-05 Siemens Industry, Inc. Rotor apparatus and methods of improving magnetization in electric machines
US10938280B2 (en) * 2013-11-01 2021-03-02 Tesla, Inc. Flux shield for electric motor
JP5969525B2 (ja) * 2014-02-25 2016-08-17 ファナック株式会社 端絡環を備える回転子、および電動機
WO2015151362A1 (fr) * 2014-03-31 2015-10-08 三菱電機株式会社 Rotor de moteur à cage d'écureuil, et moteur à cage d'écureuil
DE102015224577A1 (de) * 2015-12-08 2017-06-08 Bayerische Motoren Werke Aktiengesellschaft Rotor, Verfahren zum Herstellen eines Rotors, Asynchronmaschine und Fahrzeug
DE102015224579A1 (de) * 2015-12-08 2017-06-08 Bayerische Motoren Werke Aktiengesellschaft Rotor, Verfahren zum Herstellen eines Rotors, Asynchronmaschine und Fahrzeug
DE102017213227A1 (de) * 2017-08-01 2019-02-07 Audi Ag Rotor für eine elektrische Maschine
GB2579584A (en) * 2018-12-04 2020-07-01 Bowman Power Group Ltd Squirrel-cage rotor
US11258322B2 (en) * 2018-12-20 2022-02-22 Teco-Westinghouse Motor Company High speed induction machine
DE102020216000A1 (de) 2020-12-16 2022-06-23 Valeo Siemens Eautomotive Germany Gmbh Rotor und eine verstärkungskomponente

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2549630A1 (fr) * 2011-07-22 2013-01-23 Siemens Aktiengesellschaft Cage d'écureuil d'une machine asynchrone et procédé de fabrication d'une telle cage
US8946968B2 (en) 2011-07-22 2015-02-03 Siemens Aktiengesellschaft Squirrel-cage rotor of an asynchronous machine and method for producing such a rotor

Also Published As

Publication number Publication date
JP3718541B2 (ja) 2005-11-24
EP0786855A4 (fr) 1998-11-04
EP0786855A1 (fr) 1997-07-30
DE69634625D1 (de) 2005-05-25
US5952764A (en) 1999-09-14
EP0786855B1 (fr) 2005-04-20
JPH0928064A (ja) 1997-01-28
DE69634625T2 (de) 2005-09-22

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